TROJ_FAKEAV.SMZU
Windows 2000, XP, Server 2003
Threat Type: Trojan
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
This Trojan may be unknowingly downloaded by a user while visiting malicious websites. However, as of this writing, the said sites are inaccessible.
TECHNICAL DETAILS
169,472 bytes
PE
Yes
30 Sep 2010
Downloads files
Arrival Details
This Trojan may be unknowingly downloaded by a user while visiting malicious websites.
However, as of this writing, the said sites are inaccessible.
Autostart Technique
This Trojan adds the following registry entries to enable its automatic execution at every system startup:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
{malware name} = {malware path and file name}.EXE
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
IMWebControlUpdateInst = {malware path}\libungif4visual.exe
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
MFC80UMicrosoft = {malware path}\microsoftmicrosoft.exe
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
Servicesmime3 = {malware path}\pbvideoconfservices.exe
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\RunServices
{malware name} = {malware path and file name}.EXE
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\RunServices
ConvertersMicrosoft2003.1100.5510 = {malware path}\microsoftmsconv97.exe
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\RunServices
Diagnosticstbdres = {malware path}\diagnosticstbdres.exe
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\RunServices
msinfo32Office = {malware path}\microsoftoinfos11.exe
Download Routine
This Trojan accesses the following websites to download files:
- {BLOCKED}config.com
- {BLOCKED}igh.in
Other Details
Based on analysis of the codes, it has the following capabilities:
- This malware accesses the said websites to possibly download a variant of FAKEAV.
It does the following:
- This malware drops copies of itself in randomly selected folders in the %Program Files% directory:
- Microsoftmsconv97.exe
- MicrosoftOInfoS11.exe
- Diagnosticstbdres.exe
- pbvideoconfServices.exe
- libungif4Visual.exe
- MicrosoftMicrosoft.exe
(Note: %Program Files% is the default Program Files folder, usually C:\Program Files in Windows 2000, Server 2003, and XP (32-bit), Vista (32-bit), and 7 (32-bit), or C:\Program Files (x86) in Windows XP (64-bit), Vista (64-bit), and 7 (64-bit).)
SOLUTION
8.900
7.504.16
30 Sep 2010
9/30/2010 12:00:00 AM
Step 1
Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.
Step 2
Identify and terminate files detected as TROJ_FAKEAV.SMZU
- Windows Task Manager may not display all running processes. In this case, please use a third-party process viewer, preferably Process Explorer, to terminate the malware/grayware/spyware file. You may download the said tool here.
- If the detected file is displayed in either Windows Task Manager or Process Explorer but you cannot delete it, restart your computer in safe mode. To do this, refer to this link for the complete steps.
- If the detected file is not displayed in either Windows Task Manager or Process Explorer, continue doing the next steps.
Step 3
Delete this registry value
Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.
RESTOREStep 4
Scan your computer with your Trend Micro product to delete files detected as TROJ_FAKEAV.SMZU. If the detected files have already been cleaned, deleted, or quarantined by your Trend Micro product, no further step is required. You may opt to simply delete the quarantined files. Please check this Knowledge Base page for more information.
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